Just out of curiosity, if you get it waxed at the shop do they do as good a job as you can do at home? ie - do they scrape the grooves into it at the end and stuff?
There are 3 local shops near me that hot wax. They all charge about $25. One just uses a machine and the wax is gone pretty quick. One does it by hand, but it's hit and miss. The last does a good job and does base grinds, etc.
I do as good a job as the good shop if not better (cuz it's my board!). I use them for complicated stuff.